voyage-code-4 and Gemini Embedding 001 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
voyage-code-4, from voyageai, has a 32,000-token context window and is priced at $0.12/M tokens on OpenRouter.
Gemini Embedding 001, from Google, has a 20,000-token context window and is priced at $0.15/M tokens on OpenRouter.